兼容包和主程序中的android-support-v4.jar不同报错怎么办

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[2015-01-04 15:37:08 - Caculator] Found 2 versions of android-support-v4.jar in the dependency list,

[2015-01-04 15:37:08 - Caculator] but not all the versions are identical (check is based on SHA-1 only at this time).

[2015-01-04 15:37:08 - Caculator] All versions of the libraries must be the same at this time.

[2015-01-04 15:37:08 - Caculator] Versions found are:

[2015-01-04 15:37:08 - Caculator] Path: D:\workspace\Caculator\libs\android-support-v4.jar

[2015-01-04 15:37:08 - Caculator] Length: 995624

[2015-01-04 15:37:08 - Caculator] SHA-1: 3e4e879d0b3dc11f2feb3f55e77e3b5bd82c4a28

[2015-01-04 15:37:08 - Caculator] Path: D:\workspace\appcompat_v7\libs\android-support-v4.jar

[2015-01-04 15:37:08 - Caculator] Length: 987314

[2015-01-04 15:37:08 - Caculator] SHA-1: 9b6a9a9078af571732159b904ad423b03b7cc786

[2015-01-04 15:37:08 - Caculator] Jar mismatch! Fix your dependencies

提示信息的意思是：在我的项目Caculator中和支持库appcompat_v7包中都包含了一个叫android-suppot-v4.jar的文件，而这两个android-suppot-v4.jar是不一样的，所以编译出现了异常。

初步猜想是因为我的v_7中的包是在以前生成的，今天中午我更新了Android sdk，所以下午创建Caculator项目时生成的android-support-v4.jar跟v7中的不同了。解决办法：把android-suppot-v4.jar 从Caculator项目中直接复制到v7中，搞定！

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